Patent Application
20110181480
1. Technical Field
The disclosure generally relates to antenna modules, particularly to an antenna module having broad working frequency bands.
2. Description of Related Art
Antennas are usually assembled in a portable wireless communication device to send and/or receive signals. However, it is difficult for a portable wireless communication device to obtain a desired communication quality using an antenna having narrow working frequency bands.
Therefore, there is room for improvement within the art.
Many aspects of the antenna module can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the antenna module.
Referring to
The antenna 10 is an invert-F and dual-band antenna, and can be made of metal. The antenna 10 includes a main body 12, a feeding portion 14, and a grounding portion 16. The main body 12 is substantially a rectangular sheet. The main body 12 defines a slot 110 and correspondingly forms a first radiating portion 122, a matching portion 124, and a second radiating portion 126.
Referring to
The first radiating portion 122 is for receiving and/or sending low frequency band signals. The first radiating portion 122 is substantially a frame including a first end 1222, a first section 1224, a second wider section 1226, and a second end 1228 connected perpendicular in order. Two strip-shaped bent portions 18 connects perpendicularly to outer edges of the first end 1222 and the second end 1228 to adjust working frequency of the first radiating portion 122. The matching portion 124 is substantially a rectangular sheet extending from one end of the first end 1222 and aligning with the second end 1228 of the first radiating portion 122 with the second portion 114 of the slot 110 therebetween. The second radiating portion 126 is for receiving and/or sending high frequency band signals. The second radiating portion 126 is substantially a rectangular sheet connecting perpendicularly to one edge of the first end 1222 and facing the first portion 112 of the slot 110.
Referring to
The base board 30 is a rectangular printed circuit board (PCB). A mounting area 32 is disposed on the base board 30 to mount the antenna 10 and other electronic members (not shown) such as a speaker and a vibrator. The base board 30 defines a first L-shaped slit 34 along two adjacent edges and a second L-shaped slit 36 spaced from the first slit 34 in the mounting area 32. A coupling area 38 is formed between the first slit 34 and the second slit 36. The electrical length of the coupling area 38 is substantially 1/4 wavelength of signals sent/received by the second radiating portion 126. A feeding point (not shown) and a grounding point (not shown) are disposed on the coupling area 38. The feeding portion 14 and the grounding portion 16 respectively connect to the feeding point and the grounding point and suspend the main body 12 over the base board 30.
To use the antenna module 100 to send and/or receive signals, the coupling area 38 resonates with the antenna 10, and broadens the high working frequency band of the antenna 10 by resonances generated by the coupling area 38 and the main body 12. Referring
It is believed that the exemplary embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 99102325 | Jan 2010 | TW | national |
